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Table 1 Studies on ranges of motion associated with hip capsular laxity from arthroscopy and imaging technique for diagnosis

From: Capsular plication in the non-deformity hip: impact on post-operative joint stability

Study Diagnosis criteria for capsular laxity Technique used Sample size Follow up
Assessment type Time to follow up
M. Belemmi et al. 2014 (Chile et al., 2013) Capsulotomy for FAIa No closure Not mentioned in abstract Modified Harris Hip score Vail score WOMAC score 3 & 6 months
total closure (capsulorrhaphy)
J. Wylie et al. 2013 (Wylie et al., 2013) Capsulotomy for FAIa (patients chosen because of symptoms of instability after FAI surgery) No closure 13 patients, 14 hips (from 324 patients) Modified Harris Hip score Hip outcome score Minimum follow up of 6 months
Arthroscopic capsular repair
C.T. Hebert et al. 2014 (Hebert et al., 2014) Capsulotomy in cadaveric hips No closure (intraportal capsulotomy) 10 hips, 5 left, 5 right (range: 28–82 years old) Rotational force while flexed (90 degrees) and while extended (full) (before & after surgery) None
Capsulorrhaphy: (intraportal capsulotomy)
Capsulorrhaphy: (T capsulotomy)
Bayne et al. 2014 Capsulotomy in cadaveric hips Intact capsule 13 hips External rotation torque while in neutral flexion & maximal flexion None
Transverse capsulotomy
Magerkurth et al. 2013 (Magerkurth et al., 2013) Retrospective assessment of imaging after laxity diagnosis at surgery Magnetic resonance imaging 27 patients, 17 positive, 10 negative for hip joint laxity Measurements of capsular & zona orbicularis thickness None
Blakey et al. 2010 (Blakey et al., 2018) Excessive external rotation at rest + pain Dynamic MRI 11 hips (10 patients, averaged 31 years old, range 21–47) Physical exam (FABER test, FADIR test, recoil test…) Beighton hypermobility score None
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